Nut-lock.



E. L. LIBBY & GQB. DAVIS. NUT LOCK, APPLICATION FILED JULY 6, 1910.

A e T Patented Dec. 20, 1910.

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ERNEST L. LIBBY AND GREEN B. DAVIS, OF LINN CREEK, MISSOURI.

NUT-LOCK.

To all whom it may concern:

Be it known that we, Enxnsr L. LIBBY and Gnniix B. DAVIS, citizens ofthe United States, residing at Linn Creek, in the county of Camden andState of Missouri, have invented new and useful Improvements inNut-Locks, of which the following is a speci fication.

This invention relates to improvements in nut locks and has for itsobject the provision of a nut lock provided with a locking pin adapted,when turned to one position to engage with the threads of a. nut,whereby movement of the same upon the threads of the bolt will beprevented and when turned to another position to permit the removal ofthe nut.

\Vith the above and other objects in view, which will fully hereinafterappear, the present invention consists in certain novel details ofconstruction and arrangement of parts, hereinafter fully described,illustrated in the accompanying drawings, and more particularly pointedout in the ap pended claims; it being understood that various changes inthe form, proportion, size, and minor details of the device may be made,within the scope of the appended claims, without departing from thespirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, forming part of the specification ;-Figure1 is an end view showing the locking key in inoperative position. F 2 isa similar view showing the locking key in operative position. Fig. 3 isa detail side elevation of the threaded shank portion of the bolt. Fig.4 is a detail perspective of the locking key. Fig. 5 is a transversesectional view on the line of Fig. 3 showing the locking key in thegroove and in inoperative position. Fig. 6 is a similar view but showingthe locking key in operative position.

Similar numerals of reference are employed to designate correspondingparts throughout.

The shank of the bolt is designated by the numeral 5 and at one endportion thereof is screw-threaded, as shown at 6. The end of thescrew-threaded portion 6 of the bolt is conical as shown at 7, andformed throughout the length of the screw-threaded portion 6 is a grooveor channel 8, the inner end of said groove or channel terminating iii aninwardly extending socket Specification of Letters Patent.

Application filed July 6, 1910.

Patented Dec. 20, 1910.

Serial No. 570,629.

9. By reference now to Fig. 2 of the drawings it will be seen that themedial line of the floor of the groove or channel is located to one sideof the highest point of the conicalshaped end 7 .of the bolt, the sidesof said channel or groove being unequal in width. In order that thesides of the channcl or groove may be unequal in width as stated it isevident that one side will extend radially of the bolt, while theopposite side will be parallel with the first-named side. The floor ofthe groove is rounded, for a purpose to be presently described.

The nut is designated in general by the numeral 10 and is provided withthe usual threaded bore the threads of which engage with the threadedportion 6 of the bolt.

The locking key comprises a shank portion designated by the numeral 11.The length of this shank corresponds to the length of the channel orgroove 8. The shank is substantially pyriform in cross section, thesmaller end being sharpened to provide a cutting edge. The length ofsuch cross section corresponding approximately to the width of thegroove but greater than the depth of the groove, so that when one sideof the shank bears on the rounded floor of the groove the sharp edge ofthe shank will lie within the edges of the sides of the grooves, wherebythe nut 10 may be screwed onto the bolt without contacting with theshank 11. One end of the shank 11 terminates in a lateral extension ornose 12, which is loosely received by the socket 9, the provision of thenose limiting endwise move ment of the shank in one direction. Theopposite end of the shank terminates in a laterally curved extension orkeeper 13, which bears on the conical-shaped end 7 of the bolt. Owing tothe length of the shank the latter will be held against endwise movementin either direction through the cooperation of the keeper and nose. Itwill be observed, owing to the disposition of the keeper, that when oneside of the shank bears on the floor of the groove the keeper 13 willbear on one side of the conicalshaped end 7. hen, however, the keeper ismoved across the highest or outermost point of the conical-shaped end 7,it being understood that the keeper is somewhat resilient and that thismovement may be effected with a suitable tool, the shank will be turnedso that the sharp edge thereof will extend a trifle beyond the narrowside walls of the groove and into engagement with the threads of a nutafter the latter has been screwed onto the portion 6 of the bolt. lVhenthe sharp edge of the shank engages with the threads of the nut as justdescribed outward turning movement of the nut will be prevented, butinward or tightening movement of the nut will be permitted by virtue ofthe nut turning the shank so that the edge thereof will move into thegroove. Reversing the position of the keeper the nut may be removed fromthe bolt.

From the foregoing, it is evident that we have provided a device whichis comparatively simple in structure and inexpensive in manufacture,embodying few parts and theseso arranged that the danger of derangementwill be reduced to a minimum.

We claim 1. In a nut lock, the combination with a bolt having acone-shaped end and a 1011- gitudinal groove terminating at its innerend in a socket, and a nut threadable onto the bolt; of a locking keyhaving a shank portion insertible into the groove and provided with asharpened edge said shank being oblong in cross section, the length ofsuch cross section being greater than the depth but approximately thesame as the width of said groove, said locking key being provided at oneend with an extension receivable by the socket, and further provided atits opposite end with a resilient keeper adapted when moved in onedirection over the outermost point of the cone-shaped end to rock theedge of the locking pin into engagement with the threads of the nut.

2. In a nut lock, the combination with a bolt having a cone-shaped endand a longitudinal groove terminating at its inner end in a socket, anda nut threadable onto the bolt; of a locking key having a shank portioninsertible into the groove and provided with a sharpened edge, saidshank being pyriform in cross section, the length of such cross sectionbeing greater than the depth or approximately the same as the width ofsaid groove, said locking key being provided at one end with a lateralextension to loosely fit within the socket, and provided at its oppositeend with a curved resilient keeper adapted when moved in one directionover the outermost point of the coneshaped end to rock said shankportion to such position that the sharpened edge thereof will engagewith the thread of the nut.

In testimony whereof we atiix our signatures in presence of twowitnesses.

ERNEST L. LIBBY. GREEN B. DAVIS.

lVitnesses Sin G. Roaorr, E. C. TRAW.

